废金属中的有机物杂质，如木料、塑料、涂料和织物，能被烧除。

Impurities consisting of such organic materials as wood, plastic, paint, and fabric can be burned off.

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把锅倒空坐在炭火上，使锅烧热，使铜烧红，熔化其中的污秽，除净其上的锈。

Then set the empty pot on the coals till it becomes hot and its copper glows so its impurities may be melted and its deposit burned away.

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本文针对二烧含氟烟气净化现状，分析了除氟效率低的原因并指出了解决的途径。

The reasons for low efficiency and methods were found out on the existing cleaning situation.

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